基于DSP的PCIJMC2000计算机数据加密卡设计

计算机数据加密卡PCUMC2000采用DSP与FPGA实现数据加、解密。PCUMC2000能提供达40Mbit／s的数据处理速度，采用硬件和软件相结合的加密方法，可方便升级算法，并使加密程序代码更加安全可靠。DSP具有高度的并行结构、专用硬件逻辑以及许多专用指令，可以实现快速加密算法，DSP的双访问RAM和主机并行接口可以实现数据PCI传送和DSP处理同时进行。采用深度缓冲技术使花在主机中断上的时间几乎可以忽略不计。

Design of Data Encryption Card PCIJMC2000 Based on DSP

The Computer Data Encryption card PCIJMC2000 en/decrypts data with DSP and FPGA. PCIJMC2000 can process data at a speed of 20Mbit/s. It provides a convenient way for us to update encryption algorithm by applying hardware and software technology. And, it makes the encryption code more safely. We can take DSP to realize fast encryption algorithm because of its highly parallelism, application-specific hardware logic, and application-specific instructions. PCI transaction and DSP processing of data can take place simultaneously for its dualaccess RAM and host port interface. And, the time taken for interruption almost can be ignored because of deep buffer technology.